PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/31-18:12:40
G01     320.7          12.1                4.6 +/-   22.01      12.1 +/-   22.01  0.120 / 0.160
G08     264.3          16.4               11.4 +/-    1.02      27.5 +/-    1.02  0.230 / 0.200
G10     67.6           57.2               10.4 +/-    0.67      12.1 +/-    0.67  0.040 / 0.080
G11     309.6          18.7                7.7 +/-    2.28      17.4 +/-    2.28  0.070 / 0.070
G14     276.4          68.0               10.6 +/-    0.55      11.3 +/-    0.55  0.020 / 0.020
G18     96.6           32.0                9.0 +/-    1.10      15.1 +/-    1.10  0.020 / 0.020
G27     227.9          12.9                9.6 +/-    2.63      25.1 +/-    2.63  0.030 / 0.040
G31     178.4          33.6               12.0 +/-    0.96      19.5 +/-    0.96  0.030 / 0.040
G32     349.6          72.1               10.8 +/-    0.39      11.3 +/-    0.39  0.200 / 0.440